Abstract: A medical balloon and a catheter utilizing the balloon and a mechanism to attach the medical balloon to the catheter tube, and method of making the balloon. The attachement mechanism forms a joint and comprises a plurality of co-extruded and coextensive layers of different polymeric materials, at least one of which is a base structural layer and the other of which is formed of polyethylene and copolymers thereof or of Selar. The base structural layer is thicker then the other layer. The attachment mechanism can be the balloon itself or it can be a sleeve, either of which is heat sealed to the catheter tube. In either case, the diameter of the catheter at the joint is substantially the same as the tube.

Abstract: Device for use with a typewriter having manual half back space lever to permit making bold face characters. When bold face typing is desired, the device is removably secured to the typewriter, adjacent to the half-space lever, to permit incremental adjustment of the lever and typewriter carriage. By proper adjustment of the lever with the device, restruck characters can be made to have the appearance of bold face.